arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.01007math.NAcs.LGcs.NA
收藏

带边界罚的DeepRitz方法的误差估计

Error Estimates for the Deep Ritz Method with Boundary Penalty

Max Planck Institute for Mathematics in the Sciences(马克斯·普朗克数学研究所);Simula Research Laboratory(西穆拉研究实验室)

Johannes Müller, Marius Zeinhofer

摘要:

本文对线性椭圆型方程的Deep Ritz方法进行了误差估计。对于Dirichlet边界条件,我们估计了边界值通过边界罚方法施加时的误差。我们的研究结果适用于任意集的anastomic函数和估计的误差依赖的优化精度,近似能力的anastomic类和-在Dirichlet边界值的情况下-惩罚强度$λ$。据我们所知,我们的结果是目前文献中唯一的处理Dirichlet边界条件的情况下,在充分的一般性,即,而没有导致所有$H^1(Ω)$上的双折射率的低阶项。此外,我们还讨论了我们的结果对通过ReLU网络给出的animals类的影响以及与现有有限元函数估计的关系。对于高维问题,我们的结果表明,良好的逼近能力的光滑函数的神经网络继承了深里兹方法。

英文摘要:

We estimate the error of the Deep Ritz Method for linear elliptic equations. For Dirichlet boundary conditions, we estimate the error when the boundary values are imposed through the boundary penalty method. Our results apply to arbitrary sets of ansatz functions and estimate the error in dependence of the optimization accuracy, the approximation capabilities of the ansatz class and -- in the case of Dirichlet boundary values -- the penalization strength $λ$. To the best of our knowledge, our results are presently the only ones in the literature that treat the case of Dirichlet boundary conditions in full generality, i.e., without a lower order term that leads to coercivity on all of $H^1(Ω)$. Further, we discuss the implications of our results for ansatz classes which are given through ReLU networks and the relation to existing estimates for finite element functions. For high dimensional problems our results show that the favourable approximation capabilities of neural networks for smooth functions are inherited by the Deep Ritz Method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑